Her character experienced a tragic loss at the end of "Age of Ultron." Scarlet Witch's twin Quicksilver died in the movie. She eventually joined Captain America and the New Avengers team.

In an interview with MTV News at the Toronto Film Festival, Olsen revealed the significant role Scarlet Witch will be playing in "Civil War" saying, "She's OK. She's doing alright. She's confused, she's conflicted. She's found some people she thinks she connects with, but she's doing alright. They released images of Team Cap and Team Iron Man. She wasn't there. She's always the wild card. I like being the wild card."

This "wild card" comment had fans speculating that she could once again switch sides the way she did in "Age of Ultron."

Olsen also added that she worked again with movement coach, Jennifer White, and in the process revealed another big change happening with her character.

"It's not a new hand technique per say. We're trying to grow her movement as a whole... Jenny and I have great pride in trying to make this a huge transformation - the next time we see her - of her abilities," the "I Saw the Light" actress said.

OFFICIAL SYNOPSIS: "Captain America: Civil War" picks up where "Avengers: Age of Ultron" left off, as Steve Rogers (Chris Evans) leads the new team of Avengers in their continued efforts to safeguard humanity. After another international incident involving the Avengers results in collateral damage, political pressure mounts to install a system of accountability and a governing body to determine when to enlist the services of the team. The new status quo fractures the Avengers while they try to protect the world from a new and nefarious villain.